3 replies to this topic

[vishal]

Hello everyone!

Can any one provide me the general information on Spiral Heat Exchangers.
If I want to use a vent condensor of spiral heat exchanger, how efficient it would be to condense the vent gas from the primary shell n tube condensor.

Thank You!

[Padmakar Katre]

Dear Vishal,
From your all posts it seems you are into process design.My suggestion to you is to go to your library and have thorough understang of what you want because this is the place where your most of the queries will be answered.And still you have some geniune doubt this is right platform to discuss but I hope prior to that just search the required information because this is something which is quite basic you are asking in the forum.
Anyways I had a google search for your query and I found a good database,Here are the links,

http://www.alfalaval...mp;languageID=1

http://www.kurose.co.jp/sh_sp_e.htm

http://www.sentry-eq.../spiraltube.php

http://scitation.aip...t/GetabsServlet?

prog=normal&id=JHTRAO000128000003000295000001&idtype=cvips&gifs=yes

http://www.ept.ntnu....tExchangers.pdf

Else wait as our cheresources Admin is planning to bring the new topic i.e. the compact heat transfer,
Even I am desperately waiting for that.

[Art Montemayor]

Sometimes the Spiral type of heat exchanger can be an excellent choice for a vent condenser - particularly when one is looking for top and effective heat transfer. However, be prepared for a tradeoff in price.

There are basically two types of spiral heat exchangers - the type using conventional condenser tubing and the the type using flat plates. Which type are you interested in? The former type is limited to relatively small, compact heat loads. The latter is more applicable to larger heat duties and lower pressures. Again, what are your process conditions. Without specific basic data, I can only reply in a general sense.

There are many suppliers. Some that I personally have used are Alfa Laval for the large plate spirals and Graham for the smaller, tube spirals. You can inquire at their websites.

[Chris Haslego]

The spiral heat exchanger could make a good choice for a secondary vent condenser, if the operating pressure is very low (say 3 psia or lower). If the pressure is higher than this, a welded plate style would probably be a better choice. The welded plate unit will have a higher pressure loss, but it should easily be able to be kept to under 0.50 psi.

The trade name for the specific unit that I've had tremendous luck with is called the Compabloc from Alfa Laval:

Compabloc

This fully welded, plate type unit has been used many, many times as both a primary and a secondary condenser. What separates this welded plate unit from others is that the carbon steel panels can be removed the heat transfer heart or core can be hydroblasted clean. The carbon steel panels have compression gaskets that seal the unit very much like the head of a shell and tube unit. If you can tell me where you are, I might be able to point you to someone for further technical support.